Improvement in sawing-machines



UNITED STATES TENT CEEIGE.

WILLIAM NEIDEEEEE, 0E MITCHELL, INDIANA.

IMPROVEMENT IN SAWING-MACHINES.

To all whom it may concern:

Be it known that I,WILLIAM NEIDEFEER, ot" Mitchell, in the county ot'Lawrence and btate ot' Indiana, have invented a new and valuableImprovement in Sawing-Machines; and I do hereby declare that thefollowing is a full, clear, and exact description ot' the construe tionand operationot' the same, reference being had to the annexed drawingmaking a part otl this specication, and to the letters and ligures ot'reference marked thereon.

Figure l ot' the drawing is a representation ot a side view of myinvention. Fig. 2 is a top View of my invention.

lhis invention has relation to sawing-ma chines; and consists in theconstruction and novel arrangement ot' a spring-motor with de.- vicesfor communicating motion therefrom to the saw, and a friction-brake toprevent the recoil ot' the spring while it is being wound up, all ashereinafter moreI lully described.

In the accompanying drawing illustrating this invention, A designatesthe frame of my improved sawing-machine. upon one end ot which moves thesaw-carriage B, provided with a-weighted cord, U, which passes over aroller, d, 011 a transverse shaft, d', ot' t-he frame, and operates todraw the table back automatically when the board is cut. D indicates thesa-w, and D the saw-shaft, the latterjournaled transversely upon theframe A, and provided with the pinion E and frictionroller F. Thefrictioni'oller is arranged out-- side the frame. A similar roller, E2,is placed on the end ot' a transverse shaft, e, which has its bearingsin slots or large boxes, and is capable ot' being shifted at its endtoward and away from the roller F. The sha f't c is armed with a dog, G,which engages with a rack, g, on the side ot' an upright plate, H, andis designed to hold the roller E2 either in close contact with or apartfrom theroller F, accordin g as it is required to have the sawstationary or running. l denotes a transverse shaft, holding aspur-wheel, t, which engages with the pinion E, and a pinion, i', whichengages with a spur-wheel, i2, on a transverse shaft, i3, which is alsofurnished wit-h a pinion, i4, engaging with the main spur-wheel Jattached to the transverse motor-shaft K. L designates a spring, havingone end attached to the frame A, and the other to the shaft K. Thisspring is wound by turning the crank M ou the end ot the shatt K. Aratchet-wheel, N, is secured to said shaft, and communicates motion andpower to the wheel J through the medium ot' a pawl, o, pivoted to saidVspur-wheel, and held in position by means ot a spring, P. While thespring is being wound the pawl allows thc ratchet to turn independentlyot' the wheel J. For thepinion E and spur-wheel L', a. pair otlbelt-wheels and a belt may be some` times advantageously substituted.When the rollers F E2 are brought closely together, the movement ot thedevices for communicating motion to the saw is prevented.

What l claim as new isl. The combination ofthe spring L, spurwheel J,pawl and ratchet o N, gea-ring E 'i il t2 4, shaft L', and saw D,substantially as specified.

Witnesses:

O. METCALF, WILLIAM A. B UETON.

